Amit Singhal, a Google Fellow, recently wrote a blog post about Google’s ranking algorithms. It’s a very basic, but interesting read. In the blog post he said three things that I found to be interesting and relevant. The first of these are the three guiding principles of the Google ranking philosophy:
1) Best locally relevant results served globally.
2) Keep it simple.
3) No manual intervention.
That’s pretty cut and dry. That first principle is really the heart of search engine algorithms and derivatively of search marketing. All information is, in a sense, local. All information retrieval is global. But you could also just as well say the reverse. Online, the local and the global collude and obscure into one vein.
Is that good or bad? I guess it depends on your point of view, but it is reality and if you want to rank well online then you have to understand that every page you build to be crawled by the search engines has the potential to rank locally as well as globally. You hold the keys to how well or poorly it does online.
The second thing Amit said that I found interesting is this:
The second reason we have a principle against manually adjusting our results is that often a broken query is just a symptom of a potential improvement to be made to our ranking algorithm. Improving the underlying algorithm not only improves that one query, it improves an entire class of queries, and often for all languages.
In the midst of keeping it simple, the Google ranking team has decided to keep manual editing and adjustment to a minimum. That means they can’t show any favoritism. By tweaking their algorithms to address issues in the ranking structure of the Web, Google is able to fix problems at the macro level instead of the micro level. That means they can fix many websites just by addressing the issues related to one because not all of them will be reported. Understanding this is vital to understanding how to present your pages for ranking.
Finally, the third thing I found interesting is the frequency that Google makes changes to its algorithms.
We make about ten ranking changes every week and simplicity is a big consideration in launching every change.
Ten ranking changes every week. That’s a lot. It’s more than one a day and it begs the question, “Does Google ever reverse itself?” I think it probably does, but you’d search hard and long to find examples of it that are provable. Nevertheless, understanding that Google is always making changes to its algorithms is essential to having a good understanding of search technology. There’s no magic pill. There are only principles. Learn them and you can succeed.